Drain flusher



FIG. 1 is a side elevation view of a drain flusher showing our new design the opposite side view, and the front and rear views are all identical to that shown in FIG. 1;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a bottom plan view thereof. 

The ornamental design for a drain flusher, as shown and described. 